Dispersal and ejaculatory strategies associated with exaggeration of weapon in an armed beetle.

Abstract

Weapons used in male fighting can be costly to males and are often reported to trade off with other characters such as wings or spermatogenic investment. This study investigated whether increased investment into weapons can generate evolutionary changes in mating strategy for armed males. Male flour beetles, Gnatocerus cornutus, have enlarged mandibles that are used in male-male competition. We subjected these weapons to 12 generations of bidirectional selection and found trade-offs between weapons and two other male characters: wing and testis size. In addition, probably as a consequence of the observed changes in investment, dispersal ability and ejaculatory volume differ significantly between the lines. This indicates that the exaggeration of a weapon can be associated with dispersal and ejaculatory strategies. Thus, altered investment into weapons can lead to correlated changes in life-history traits.

DOI: 10.1098/rspb.2009.2017

4 Figures and Tables

01020201520162017
Citations per Year

Citation Velocity: 6

Averaging 6 citations per year over the last 3 years.

Learn more about how we calculate this metric in our FAQ.

Cite this paper

@article{Yamane2010DispersalAE, title={Dispersal and ejaculatory strategies associated with exaggeration of weapon in an armed beetle.}, author={Takashi Yamane and Kensuke Okada and Satoshi Nakayama and Takahisa Miyatake}, journal={Proceedings. Biological sciences}, year={2010}, volume={277 1688}, pages={1705-10} }